×12= -= 100×50%= 0.32= 5﹣0.99=
1800÷45= 6.4+9.6= 0.875﹣= 12×98≈
56×= 1.6×125%= ×24÷= 9+11+13+……+41=
×4=
3÷40%=
÷=
÷×0=
∶=
-0.25=
0.78×=
24.8-4.8÷=
=
8.1÷0.9=
11×40=
810÷30=
÷ =
20×498≈
9.8÷0.01=
2.05﹣0.5=
8×25%=
2﹣ =
÷5=
4.58+5.42=